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/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "config.h"
#include "FunctionConstructor.h"
#include "FunctionPrototype.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
#include "JSString.h"
#include "Parser.h"
#include "Debugger.h"
#include "lexer.h"
#include "nodes.h"
namespace JSC {
ASSERT_CLASS_FITS_IN_CELL(FunctionConstructor);
FunctionConstructor::FunctionConstructor(ExecState* exec, PassRefPtr<StructureID> structure, FunctionPrototype* functionPrototype)
: InternalFunction(&exec->globalData(), structure, Identifier(exec, functionPrototype->classInfo()->className))
{
putDirectWithoutTransition(exec->propertyNames().prototype, functionPrototype, DontEnum | DontDelete | ReadOnly);
// Number of arguments for constructor
putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontDelete | DontEnum);
}
static JSObject* constructWithFunctionConstructor(ExecState* exec, JSObject*, const ArgList& args)
{
return constructFunction(exec, args);
}
ConstructType FunctionConstructor::getConstructData(ConstructData& constructData)
{
constructData.native.function = constructWithFunctionConstructor;
return ConstructTypeHost;
}
static JSValue* callFunctionConstructor(ExecState* exec, JSObject*, JSValue*, const ArgList& args)
{
return constructFunction(exec, args);
}
// ECMA 15.3.1 The Function Constructor Called as a Function
CallType FunctionConstructor::getCallData(CallData& callData)
{
callData.native.function = callFunctionConstructor;
return CallTypeHost;
}
// ECMA 15.3.2 The Function Constructor
JSObject* constructFunction(ExecState* exec, const ArgList& args, const Identifier& functionName, const UString& sourceURL, int lineNumber)
{
UString p("");
UString body;
int argsSize = args.size();
if (argsSize == 0)
body = "";
else if (argsSize == 1)
body = args.at(exec, 0)->toString(exec);
else {
p = args.at(exec, 0)->toString(exec);
for (int k = 1; k < argsSize - 1; k++)
p += "," + args.at(exec, k)->toString(exec);
body = args.at(exec, argsSize - 1)->toString(exec);
}
// parse the source code
int errLine;
UString errMsg;
SourceCode source = makeSource(body, sourceURL, lineNumber);
RefPtr<FunctionBodyNode> functionBody = exec->globalData().parser->parse<FunctionBodyNode>(exec, exec->dynamicGlobalObject()->debugger(), source, &errLine, &errMsg);
// No program node == syntax error - throw a syntax error
if (!functionBody)
// We can't return a Completion(Throw) here, so just set the exception
// and return it
return throwError(exec, SyntaxError, errMsg, errLine, source.provider()->asID(), source.provider()->url());
// parse parameter list. throw syntax error on illegal identifiers
int len = p.size();
const UChar* c = p.data();
int i = 0;
UString param;
Vector<Identifier> parameters;
while (i < len) {
while (*c == ' ' && i < len)
c++, i++;
if (Lexer::isIdentStart(c[0])) { // else error
param = UString(c, 1);
c++, i++;
while (i < len && (Lexer::isIdentPart(c[0]))) {
param.append(*c);
c++, i++;
}
while (i < len && *c == ' ')
c++, i++;
if (i == len) {
parameters.append(Identifier(exec, param));
break;
} else if (*c == ',') {
parameters.append(Identifier(exec, param));
c++, i++;
continue;
} // else error
}
return throwError(exec, SyntaxError, "Syntax error in parameter list");
}
size_t count = parameters.size();
functionBody->finishParsing(parameters.releaseBuffer(), count);
JSGlobalObject* globalObject = exec->lexicalGlobalObject();
ScopeChain scopeChain(globalObject, globalObject->globalData(), exec->globalThisValue());
JSFunction* function = new (exec) JSFunction(exec, functionName, functionBody.get(), scopeChain.node());
JSObject* prototype = constructEmptyObject(exec);
prototype->putDirect(exec->propertyNames().constructor, function, DontEnum);
function->putDirect(exec->propertyNames().prototype, prototype, DontDelete);
return function;
}
// ECMA 15.3.2 The Function Constructor
JSObject* constructFunction(ExecState* exec, const ArgList& args)
{
return constructFunction(exec, args, Identifier(exec, "anonymous"), UString(), 1);
}
} // namespace JSC
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